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Detachable Anti Radiation Earphone Single Earphone
Obama bodyguards use the same, everywhere in movie, noble and not expensive.
The acoustic wave vibration is transmitted through the hollow catheter, avoid distortion and other noise generated by a loudspeaker. In addition, by catheter turn conduction sound, the human ear does not need to close to speakers, so it is more confortable without magetic radiation and heat generated by speaker working.
Because of its transparent material, easy concealment using, therefore it is good choice among special people like entertainment staff, security police etc and some people for long-time work.